Dear scientists,
With your patient answer and help, I successfully generated a 0.01 ° surfdata file (2000) using the rawdata and land use data I prepared. Now I want to perform a spin up but I'm a little confused. I have prepared forcing data CMFD for 1979-2018, with data from 1979 to 1999 used for spin up and data from 2000 to 2018 used for actual running.
1) Based on the user guide and forum posts, I know that the actual running should create an IHISTClm50SpGs case. So what case should the corresponding spinup create? Is it I2000Clm50SpGs? If so, Which year's surfdata file should I use for the spin up case, 1979 or 2000? Based on my understanding, I should use the 2000 surfdata because I modified the parameters in the 2000 surfdata, which is why I need to spin up it to reach steady state. Is my understanding correct? By the way, I don't have high-precision data such as landuse and LAI for 1979. If I need to use 1979 data, I can only use CLM default data, which seems to conflict with my modified 2000 surfdata, right?
2) What's more, it seems that there is no corresponding resolution for 0.01 deg in the CESM 2.2.0 Grid Resolution Definitions. Should I create a new resolution for 0.01 deg following the instructions mentioned in the user guide? I am still not very clear about the steps to create a new resolution. Firstly, add '606x808_shanxiChina' to list of valid_values for the id=”res” entry in $CTSMROOT/bld/namelist_files/namelist_definition_ctsm.xml and also $CIMEROOT/config/cesm/config_grid.xml; Then use the new resolution by using CLM_USRDAT_NAME. Lastly, $CTSMROOT/bld/namelist_files/namelist_defaults_clm4_5.xml.Does the procedure right? But without giving a true 0.01 deg SCRIP file, can CTSM really create a resolution pointing to 0.01°? Please correct me if I misunderstood.
3) I also wonder if I want to use my own landuse-timeseries data (2000-2018, one file per year), Do I have to combine all years of data into one file (like landuse.timeseries_1.9x2.5_hist_16pfts_simyr1850-2015_c170428.nc)?
Any advice would be greatly appreciated. Thank you!
With your patient answer and help, I successfully generated a 0.01 ° surfdata file (2000) using the rawdata and land use data I prepared. Now I want to perform a spin up but I'm a little confused. I have prepared forcing data CMFD for 1979-2018, with data from 1979 to 1999 used for spin up and data from 2000 to 2018 used for actual running.
1) Based on the user guide and forum posts, I know that the actual running should create an IHISTClm50SpGs case. So what case should the corresponding spinup create? Is it I2000Clm50SpGs? If so, Which year's surfdata file should I use for the spin up case, 1979 or 2000? Based on my understanding, I should use the 2000 surfdata because I modified the parameters in the 2000 surfdata, which is why I need to spin up it to reach steady state. Is my understanding correct? By the way, I don't have high-precision data such as landuse and LAI for 1979. If I need to use 1979 data, I can only use CLM default data, which seems to conflict with my modified 2000 surfdata, right?
2) What's more, it seems that there is no corresponding resolution for 0.01 deg in the CESM 2.2.0 Grid Resolution Definitions. Should I create a new resolution for 0.01 deg following the instructions mentioned in the user guide? I am still not very clear about the steps to create a new resolution. Firstly, add '606x808_shanxiChina' to list of valid_values for the id=”res” entry in $CTSMROOT/bld/namelist_files/namelist_definition_ctsm.xml and also $CIMEROOT/config/cesm/config_grid.xml; Then use the new resolution by using CLM_USRDAT_NAME. Lastly, $CTSMROOT/bld/namelist_files/namelist_defaults_clm4_5.xml.Does the procedure right? But without giving a true 0.01 deg SCRIP file, can CTSM really create a resolution pointing to 0.01°? Please correct me if I misunderstood.
3) I also wonder if I want to use my own landuse-timeseries data (2000-2018, one file per year), Do I have to combine all years of data into one file (like landuse.timeseries_1.9x2.5_hist_16pfts_simyr1850-2015_c170428.nc)?
Any advice would be greatly appreciated. Thank you!
